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Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 47 |
| 4 | 5167 |
| 5 | 1950380 |
| 6 | 2709368919 |
[0,1,47,5167,1950380,2709368919] |